Làm giúp mình bài này với ạ. Mình cảm ơn

Bài 1:

Viết lại câu sử dụng tình từ ghép.

1 My sister has bought two new bicycles for her children. They are five million dong.

> My sister

2 My son has won a competition. It had three rounds.

> My son

3 The interview lasted for forty five minutes

> It

4 she wrote an essay about endangered species. It is two thousand words.

> She

37 she is making a thirty slide power point for her presentation

> the power point